Mnemonic symbol: the character 彐 looks a bit like a pig snout seen from the side. If you need to type it, remember its pronunciation ji4 by imagining Joan of Arc wearing a fake pig snout in the space station's bathroom and making grunting and squealing sounds.
former Pu'er Hani and Yi autonomous county in Yunnan, renamed in 2007 Ning'er Hani and Yi autonomous county 寧洱哈尼族彞族自治縣|宁洱哈尼族彝族自治县, capital Pu'er city 普洱市